[v6.6] BUG: soft lockup in hsr_announce
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syzbot
May 28, 2026, 4:15:30 PM (7 days ago) May 28
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 0a40c6fbd105 Linux 6.6.141
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17ae452e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=90249d2d52c08134
dashboard link: https://syzkaller.appspot.com/bug?extid=275266cebc6586d5795e
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f8ea9d2eccbd/disk-0a40c6fb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c6db60fe7f69/vmlinux-0a40c6fb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0b2a5cb7bba7/bzImage-0a40c6fb.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+275266...@syzkaller.appspotmail.com
watchdog: BUG: soft lockup - CPU#0 stuck for 111s! [syz.3.2879:14241]
Modules linked in:
irq event stamp: 5755627
hardirqs last enabled at (5755626): [<ffffffff8aa0144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
hardirqs last disabled at (5755627): [<ffffffff8a8812ee>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1088
softirqs last enabled at (5724748): [<ffffffff815277e3>] __do_softirq kernel/softirq.c:612 [inline]
softirqs last enabled at (5724748): [<ffffffff815277e3>] invoke_softirq kernel/softirq.c:452 [inline]
softirqs last enabled at (5724748): [<ffffffff815277e3>] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
softirqs last disabled at (5724751): [<ffffffff815277e3>] __do_softirq kernel/softirq.c:612 [inline]
softirqs last disabled at (5724751): [<ffffffff815277e3>] invoke_softirq kernel/softirq.c:452 [inline]
softirqs last disabled at (5724751): [<ffffffff815277e3>] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
CPU: 0 PID: 14241 Comm: syz.3.2879 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:100 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x485/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 4b 00 4d 29 e4 e9 a4 00 00 00 4c 89 e5 4c 89 64 24 28 48 ba 00 00 00 00 00 fc ff df 4c 8b 74 24 48 48 89 d8 4c 29 e0 48 89 c1 <48> c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4d 8d 3c 44 4c 89 f8
RSP: 0018:ffffc90000007438 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffffffff8ea33be8 RCX: 0000000000000004
RDX: dffffc0000000000 RSI: ffffffff81df42c5 RDI: ffffffff81df42cf
RBP: ffffffff8ea33be4 R08: ffffc900000075d0 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8ea33be4
R13: ffffffff81df42cf R14: ffffffff81df42c5 R15: ffffffff8ea33bec
FS: 00007f1af48726c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000064000 CR3: 000000005f7cb000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x270 mm/slub.c:3852
kfree_skb include/linux/skbuff.h:1264 [inline]
hsr_forward_skb+0x1901/0x2140 net/hsr/hsr_forward.c:636
send_hsr_supervision_frame+0x5fb/0xb90 net/hsr/hsr_device.c:346
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:schedule+0xb8/0x170 kernel/sched/core.c:6774
Code: 74 0a be 01 00 00 00 e8 f6 5b 7c f9 49 89 de 49 c1 ee 03 eb 09 48 f7 03 08 00 00 00 74 2c bf 01 00 00 00 e8 ca 2f cc f6 31 ff <e8> a3 b9 ff ff bf 01 00 00 00 e8 59 31 cc f6 43 80 3c 3e 00 74 d5
RSP: 0018:ffffc9000d9d75d8 EFLAGS: 00000246
RAX: 1ffff11004895299 RBX: ffff8880244a8000 RCX: ffffffff972d3400
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000000
RBP: ffffc9000d9d7748 R08: ffffffff911cc50f R09: 1ffffffff22398a1
R10: dffffc0000000000 R11: fffffbfff22398a2 R12: ffffffff8e3c57e8
R13: ffff8880244a8000 R14: 1ffff11004895000 R15: dffffc0000000000
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6833
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6a9/0xcc0 kernel/locking/mutex.c:747
register_netdev+0x13/0x50 net/core/dev.c:10448
loopback_net_init+0x75/0x150 drivers/net/loopback.c:220
ops_init+0x397/0x640 net/core/net_namespace.c:139
setup_net+0x3b6/0xa30 net/core/net_namespace.c:343
copy_net_ns+0x36d/0x5e0 net/core/net_namespace.c:520
create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
copy_namespaces+0x430/0x4a0 kernel/nsproxy.c:179
copy_process+0x1724/0x3dc0 kernel/fork.c:2511
kernel_clone+0x24b/0x8a0 kernel/fork.c:2917
__do_sys_clone kernel/fork.c:3060 [inline]
__se_sys_clone kernel/fork.c:3044 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:3044
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1af399ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1af4871fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f1af3c15fa0 RCX: 00007f1af399ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000045004400
RBP: 00007f1af3a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1af3c16038 R14: 00007f1af3c15fa0 R15: 00007ffd8f93bd08
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14243 Comm: syz.0.2880 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_switch+0x81/0x120 kernel/kcov.c:349
Code: 00 00 00 b9 01 00 00 00 48 85 c0 0f 84 ae 00 00 00 41 57 41 56 41 54 53 48 8b 54 24 20 65 4c 8b 05 94 84 7c 7e 45 31 c9 eb 08 <49> ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d 82 84 7c 7e 41
RSP: 0018:ffffc900001f00d0 EFLAGS: 00000046
RAX: 0000000000000020 RBX: 000000953f2a3b04 RCX: 0000000000000005
RDX: ffffffff818a384d RSI: ffffffff8d17baa0 RDI: 0000000000000004
RBP: 0000000000000004 R08: ffff888028e50000 R09: 0000000000000007
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88801ca525d8
R13: f800000000000000 R14: 00000000000005c8 R15: 00000000000f0a44
FS: 00007fcd922b26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcc57cb630 CR3: 000000002e33c000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
check_buffer+0x24d/0x950 kernel/trace/ring_buffer.c:3497
__rb_reserve_next+0x511/0xd70 kernel/trace/ring_buffer.c:3626
rb_reserve_next_event kernel/trace/ring_buffer.c:3761 [inline]
ring_buffer_lock_reserve+0xae1/0xed0 kernel/trace/ring_buffer.c:3820
__trace_buffer_lock_reserve kernel/trace/trace.c:996 [inline]
trace_event_buffer_lock_reserve+0x1d2/0x6f0 kernel/trace/trace.c:2905
trace_event_buffer_reserve+0x2ac/0x3d0 kernel/trace/trace_events.c:661
do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
trace_event_raw_event_bpf_trace_printk+0x116/0x230 kernel/trace/bpf_trace.h:11
trace_bpf_trace_printk+0x13e/0x1a0 kernel/trace/bpf_trace.h:11
____bpf_trace_printk kernel/trace/bpf_trace.c:388 [inline]
bpf_trace_printk+0x142/0x1c0 kernel/trace/bpf_trace.c:371
bpf_prog_b1bcf1c1da0a8648+0x40/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1224 [inline]
__bpf_prog_run include/linux/filter.h:616 [inline]
bpf_prog_run include/linux/filter.h:623 [inline]
bpf_prog_run_array include/linux/bpf.h:1994 [inline]
trace_call_bpf+0x333/0x6c0 kernel/trace/bpf_trace.c:143
perf_trace_run_bpf_submit+0x7a/0x1c0 kernel/events/core.c:10295
perf_trace_preemptirq_template+0x269/0x330 include/trace/events/preemptirq.h:14
trace_irq_enable+0xbb/0xe0 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mac80211_hwsim_tx_frame_no_nl+0x7d6/0x11a0 drivers/net/wireless/virtual/mac80211_hwsim.c:1802
Code: 00 00 00 00 4c 39 6c 24 30 74 70 4d 8d bd 08 3d 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 82 05 00 00 41 80 3f 00 <74> 59 4d 8d bd 09 3d 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 30 84
RSP: 0018:ffffc900001f09a0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880556535b8 RCX: ffff888028e50000
RDX: 0000000000000100 RSI: 0000000000000004 RDI: ffffc900001f0920
RBP: ffffc900001f0b30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200003e124 R12: 1ffff9200003e148
R13: ffff88807ae8b320 R14: dffffc0000000000 R15: ffff88807ae8f028
mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2176
mac80211_hwsim_beacon_tx+0x3e9/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2269
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
__run_hrtimer kernel/time/hrtimer.c:1754 [inline]
__hrtimer_run_queues+0x520/0xc40 kernel/time/hrtimer.c:1818
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1835
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:schedule_debug kernel/sched/core.c:5938 [inline]
RIP: 0010:__schedule+0x150/0x45a0 kernel/sched/core.c:6591
Code: 74 08 48 89 df e8 a0 53 4f f7 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 87 53 4f f7 48 81 3b 9d 6e ac 57 <0f> 85 7d 16 00 00 45 85 ff 44 89 7c 24 6c 75 4c 48 8b 44 24 30 48
RSP: 0018:ffffc9000da773c0 EFLAGS: 00000246
RAX: 1ffff92001b4e000 RBX: ffffc9000da70000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000da77560
RBP: ffffc9000da775d0 R08: ffffc9000da7755f R09: 0000000000000000
R10: ffffc9000da77550 R11: fffff52001b4eeac R12: 1ffff92001b4ee98
R13: ffff8880b8f00000 R14: dffffc0000000000 R15: 0000000000000001
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:page_counter_try_charge+0x7a/0x2c0 mm/page_counter.c:120
Code: 4d 0f c1 2c 24 49 8d ac 24 98 00 00 00 48 89 e8 48 c1 e8 03 80 3c 18 00 74 08 48 89 ef e8 be 53 f9 ff 4c 03 2c 24 48 8b 6d 00 <4c> 89 ef 48 89 ee e8 6b 16 a1 ff 4c 89 e7 49 39 ed 0f 87 9d 00 00
RSP: 0018:ffffc9000da77740 EFLAGS: 00000206
RAX: 1ffff11003deac53 RBX: dffffc0000000000 RCX: ffffffff81e6175b
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801ef56200
RBP: 0007ffffffffffff R08: ffff88801ef56207 R09: 1ffff11003deac40
R10: dffffc0000000000 R11: ffffed1003deac41 R12: ffff88801ef56200
R13: 0000000000000be7 R14: 0000000000000040 R15: 1ffffffff1a2b959
try_charge_memcg+0x119c/0x1800 mm/memcontrol.c:2688
obj_cgroup_charge_pages mm/memcontrol.c:3138 [inline]
__memcg_kmem_charge_page+0x224/0x380 mm/memcontrol.c:3164
__alloc_pages+0x226/0x460 mm/page_alloc.c:4517
pipe_write+0x62b/0x1b10 fs/pipe.c:502
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x46c/0x990 fs/read_write.c:584
ksys_write+0x150/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcd9139ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcd922b2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fcd91615fa0 RCX: 00007fcd9139ce59
RDX: 00000000fffffdef RSI: 00002000000001c0 RDI: 0000000000000000
RBP: 00007fcd91432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd91616038 R14: 00007fcd91615fa0 R15: 00007ffe159df5d8
</TASK>
---
This report is generated by a bot. It may contain errors.
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If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 0a40c6fbd105 Linux 6.6.141
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=17ae452e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=90249d2d52c08134
dashboard link: https://syzkaller.appspot.com/bug?extid=275266cebc6586d5795e
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f8ea9d2eccbd/disk-0a40c6fb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c6db60fe7f69/vmlinux-0a40c6fb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0b2a5cb7bba7/bzImage-0a40c6fb.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+275266...@syzkaller.appspotmail.com
watchdog: BUG: soft lockup - CPU#0 stuck for 111s! [syz.3.2879:14241]
Modules linked in:
irq event stamp: 5755627
hardirqs last enabled at (5755626): [<ffffffff8aa0144a>] asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
hardirqs last disabled at (5755627): [<ffffffff8a8812ee>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1088
softirqs last enabled at (5724748): [<ffffffff815277e3>] __do_softirq kernel/softirq.c:612 [inline]
softirqs last enabled at (5724748): [<ffffffff815277e3>] invoke_softirq kernel/softirq.c:452 [inline]
softirqs last enabled at (5724748): [<ffffffff815277e3>] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
softirqs last disabled at (5724751): [<ffffffff815277e3>] __do_softirq kernel/softirq.c:612 [inline]
softirqs last disabled at (5724751): [<ffffffff815277e3>] invoke_softirq kernel/softirq.c:452 [inline]
softirqs last disabled at (5724751): [<ffffffff815277e3>] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
CPU: 0 PID: 14241 Comm: syz.3.2879 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:100 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x485/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: 4b 00 4d 29 e4 e9 a4 00 00 00 4c 89 e5 4c 89 64 24 28 48 ba 00 00 00 00 00 fc ff df 4c 8b 74 24 48 48 89 d8 4c 29 e0 48 89 c1 <48> c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4d 8d 3c 44 4c 89 f8
RSP: 0018:ffffc90000007438 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffffffff8ea33be8 RCX: 0000000000000004
RDX: dffffc0000000000 RSI: ffffffff81df42c5 RDI: ffffffff81df42cf
RBP: ffffffff8ea33be4 R08: ffffc900000075d0 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8ea33be4
R13: ffffffff81df42cf R14: ffffffff81df42c5 R15: ffffffff8ea33bec
FS: 00007f1af48726c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000064000 CR3: 000000005f7cb000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x270 mm/slub.c:3852
kfree_skb include/linux/skbuff.h:1264 [inline]
hsr_forward_skb+0x1901/0x2140 net/hsr/hsr_forward.c:636
send_hsr_supervision_frame+0x5fb/0xb90 net/hsr/hsr_device.c:346
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:schedule+0xb8/0x170 kernel/sched/core.c:6774
Code: 74 0a be 01 00 00 00 e8 f6 5b 7c f9 49 89 de 49 c1 ee 03 eb 09 48 f7 03 08 00 00 00 74 2c bf 01 00 00 00 e8 ca 2f cc f6 31 ff <e8> a3 b9 ff ff bf 01 00 00 00 e8 59 31 cc f6 43 80 3c 3e 00 74 d5
RSP: 0018:ffffc9000d9d75d8 EFLAGS: 00000246
RAX: 1ffff11004895299 RBX: ffff8880244a8000 RCX: ffffffff972d3400
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000000
RBP: ffffc9000d9d7748 R08: ffffffff911cc50f R09: 1ffffffff22398a1
R10: dffffc0000000000 R11: fffffbfff22398a2 R12: ffffffff8e3c57e8
R13: ffff8880244a8000 R14: 1ffff11004895000 R15: dffffc0000000000
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6833
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6a9/0xcc0 kernel/locking/mutex.c:747
register_netdev+0x13/0x50 net/core/dev.c:10448
loopback_net_init+0x75/0x150 drivers/net/loopback.c:220
ops_init+0x397/0x640 net/core/net_namespace.c:139
setup_net+0x3b6/0xa30 net/core/net_namespace.c:343
copy_net_ns+0x36d/0x5e0 net/core/net_namespace.c:520
create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
copy_namespaces+0x430/0x4a0 kernel/nsproxy.c:179
copy_process+0x1724/0x3dc0 kernel/fork.c:2511
kernel_clone+0x24b/0x8a0 kernel/fork.c:2917
__do_sys_clone kernel/fork.c:3060 [inline]
__se_sys_clone kernel/fork.c:3044 [inline]
__x64_sys_clone+0x1b7/0x230 kernel/fork.c:3044
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1af399ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1af4871fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f1af3c15fa0 RCX: 00007f1af399ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000045004400
RBP: 00007f1af3a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f1af3c16038 R14: 00007f1af3c15fa0 R15: 00007ffd8f93bd08
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14243 Comm: syz.0.2880 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_switch+0x81/0x120 kernel/kcov.c:349
Code: 00 00 00 b9 01 00 00 00 48 85 c0 0f 84 ae 00 00 00 41 57 41 56 41 54 53 48 8b 54 24 20 65 4c 8b 05 94 84 7c 7e 45 31 c9 eb 08 <49> ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 65 44 8b 1d 82 84 7c 7e 41
RSP: 0018:ffffc900001f00d0 EFLAGS: 00000046
RAX: 0000000000000020 RBX: 000000953f2a3b04 RCX: 0000000000000005
RDX: ffffffff818a384d RSI: ffffffff8d17baa0 RDI: 0000000000000004
RBP: 0000000000000004 R08: ffff888028e50000 R09: 0000000000000007
R10: 0000000000000007 R11: 0000000000000100 R12: ffff88801ca525d8
R13: f800000000000000 R14: 00000000000005c8 R15: 00000000000f0a44
FS: 00007fcd922b26c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcc57cb630 CR3: 000000002e33c000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<IRQ>
check_buffer+0x24d/0x950 kernel/trace/ring_buffer.c:3497
__rb_reserve_next+0x511/0xd70 kernel/trace/ring_buffer.c:3626
rb_reserve_next_event kernel/trace/ring_buffer.c:3761 [inline]
ring_buffer_lock_reserve+0xae1/0xed0 kernel/trace/ring_buffer.c:3820
__trace_buffer_lock_reserve kernel/trace/trace.c:996 [inline]
trace_event_buffer_lock_reserve+0x1d2/0x6f0 kernel/trace/trace.c:2905
trace_event_buffer_reserve+0x2ac/0x3d0 kernel/trace/trace_events.c:661
do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
trace_event_raw_event_bpf_trace_printk+0x116/0x230 kernel/trace/bpf_trace.h:11
trace_bpf_trace_printk+0x13e/0x1a0 kernel/trace/bpf_trace.h:11
____bpf_trace_printk kernel/trace/bpf_trace.c:388 [inline]
bpf_trace_printk+0x142/0x1c0 kernel/trace/bpf_trace.c:371
bpf_prog_b1bcf1c1da0a8648+0x40/0x44
bpf_dispatcher_nop_func include/linux/bpf.h:1224 [inline]
__bpf_prog_run include/linux/filter.h:616 [inline]
bpf_prog_run include/linux/filter.h:623 [inline]
bpf_prog_run_array include/linux/bpf.h:1994 [inline]
trace_call_bpf+0x333/0x6c0 kernel/trace/bpf_trace.c:143
perf_trace_run_bpf_submit+0x7a/0x1c0 kernel/events/core.c:10295
perf_trace_preemptirq_template+0x269/0x330 include/trace/events/preemptirq.h:14
trace_irq_enable+0xbb/0xe0 include/trace/events/preemptirq.h:40
trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:mac80211_hwsim_tx_frame_no_nl+0x7d6/0x11a0 drivers/net/wireless/virtual/mac80211_hwsim.c:1802
Code: 00 00 00 00 4c 39 6c 24 30 74 70 4d 8d bd 08 3d 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 82 05 00 00 41 80 3f 00 <74> 59 4d 8d bd 09 3d 00 00 4c 89 f8 48 c1 e8 03 42 0f b6 04 30 84
RSP: 0018:ffffc900001f09a0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff8880556535b8 RCX: ffff888028e50000
RDX: 0000000000000100 RSI: 0000000000000004 RDI: ffffc900001f0920
RBP: ffffc900001f0b30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200003e124 R12: 1ffff9200003e148
R13: ffff88807ae8b320 R14: dffffc0000000000 R15: ffff88807ae8f028
mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2176
mac80211_hwsim_beacon_tx+0x3e9/0x780 drivers/net/wireless/virtual/mac80211_hwsim.c:2269
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:766
ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:802
mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
__run_hrtimer kernel/time/hrtimer.c:1754 [inline]
__hrtimer_run_queues+0x520/0xc40 kernel/time/hrtimer.c:1818
hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1835
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:schedule_debug kernel/sched/core.c:5938 [inline]
RIP: 0010:__schedule+0x150/0x45a0 kernel/sched/core.c:6591
Code: 74 08 48 89 df e8 a0 53 4f f7 48 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 87 53 4f f7 48 81 3b 9d 6e ac 57 <0f> 85 7d 16 00 00 45 85 ff 44 89 7c 24 6c 75 4c 48 8b 44 24 30 48
RSP: 0018:ffffc9000da773c0 EFLAGS: 00000246
RAX: 1ffff92001b4e000 RBX: ffffc9000da70000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000da77560
RBP: ffffc9000da775d0 R08: ffffc9000da7755f R09: 0000000000000000
R10: ffffc9000da77550 R11: fffff52001b4eeac R12: 1ffff92001b4ee98
R13: ffff8880b8f00000 R14: dffffc0000000000 R15: 0000000000000001
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:page_counter_try_charge+0x7a/0x2c0 mm/page_counter.c:120
Code: 4d 0f c1 2c 24 49 8d ac 24 98 00 00 00 48 89 e8 48 c1 e8 03 80 3c 18 00 74 08 48 89 ef e8 be 53 f9 ff 4c 03 2c 24 48 8b 6d 00 <4c> 89 ef 48 89 ee e8 6b 16 a1 ff 4c 89 e7 49 39 ed 0f 87 9d 00 00
RSP: 0018:ffffc9000da77740 EFLAGS: 00000206
RAX: 1ffff11003deac53 RBX: dffffc0000000000 RCX: ffffffff81e6175b
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801ef56200
RBP: 0007ffffffffffff R08: ffff88801ef56207 R09: 1ffff11003deac40
R10: dffffc0000000000 R11: ffffed1003deac41 R12: ffff88801ef56200
R13: 0000000000000be7 R14: 0000000000000040 R15: 1ffffffff1a2b959
try_charge_memcg+0x119c/0x1800 mm/memcontrol.c:2688
obj_cgroup_charge_pages mm/memcontrol.c:3138 [inline]
__memcg_kmem_charge_page+0x224/0x380 mm/memcontrol.c:3164
__alloc_pages+0x226/0x460 mm/page_alloc.c:4517
pipe_write+0x62b/0x1b10 fs/pipe.c:502
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x46c/0x990 fs/read_write.c:584
ksys_write+0x150/0x260 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcd9139ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcd922b2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fcd91615fa0 RCX: 00007fcd9139ce59
RDX: 00000000fffffdef RSI: 00002000000001c0 RDI: 0000000000000000
RBP: 00007fcd91432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd91616038 R14: 00007fcd91615fa0 R15: 00007ffe159df5d8
</TASK>
---
This report is generated by a bot. It may contain errors.
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syzbot
May 30, 2026, 7:58:24 PM (5 days ago) May 30
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 0a40c6fbd105 Linux 6.6.141
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13f71673980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1104091f980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f8ea9d2eccbd/disk-0a40c6fb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c6db60fe7f69/vmlinux-0a40c6fb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0b2a5cb7bba7/bzImage-0a40c6fb.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+275266...@syzkaller.appspotmail.com
hrtimer: interrupt took 39149 ns
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=cefc/1/0x4000000000000000 softirq=12505/12507 fqs=12
rcu: (t=10502 jiffies g=9325 q=1023 ncpus=2)
rcu: rcu_preempt kthread starved for 10479 jiffies! g9325 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27720 pid:17 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:379 [inline]
RIP: 0010:__rcu_read_lock+0x0/0x60 kernel/rcu/tree_plugin.h:402
Code: b3 6d 00 e9 db fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 62 fb ff ff 4c 89 f7 e8 7c b4 6d 00 e9 55 fb ff ff 0f 1f 80 00 00 00 00 <f3> 0f 1e fa 53 65 48 8b 1d a3 fe 91 7e 48 81 c3 3c 04 00 00 48 89
RSP: 0018:ffffc900001efc78 EFLAGS: 00000006
RAX: ffffffff81ae5ac0 RBX: ffff8880318f8000 RCX: ffff888078f43c00
RDX: 0000000000010100 RSI: ffffc900001efe80 RDI: ffff8880318f8000
RBP: ffffc900001efd88 R08: ffff8880318f848b R09: 1ffff1100631f091
R10: dffffc0000000000 R11: ffffed100631f092 R12: dffffc0000000000
R13: ffff8880318f8000 R14: ffffc900001f0338 R15: 1ffff9200003df94
FS: 0000555582a1b500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
Call Trace:
<IRQ>
rcu_read_lock include/linux/rcupdate.h:784 [inline]
__perf_event_output kernel/events/core.c:7972 [inline]
perf_event_output_forward+0xb2/0x3e0 kernel/events/core.c:7995
__perf_event_overflow+0x447/0x630 kernel/events/core.c:9720
perf_event_overflow kernel/events/core.c:9741 [inline]
perf_swevent_hrtimer+0x439/0x610 kernel/events/core.c:11230
__run_hrtimer kernel/time/hrtimer.c:1754 [inline]
__hrtimer_run_queues+0x4e1/0xc40 kernel/time/hrtimer.c:1818
hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1880
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 85 c8 0f 00 eb 15 e8 7e c8 0f 00 e8 09 b8 10 09 4d 85 e4 74 ea e8 6f c8 0f 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900001f03e0 EFLAGS: 00000246
RAX: ffffffff81776381 RBX: 0000000000000000 RCX: ffff888078f43c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001f0498 R08: ffffffff911cc5ff R09: 1ffffffff22398bf
R10: dffffc0000000000 R11: fffffbfff22398c0 R12: 0000000000000200
R13: 000001fb6ca015d2 R14: 1ffff9200003e07c R15: dffffc0000000000
timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
ktime_get_with_offset+0x103/0x330 kernel/time/timekeeping.c:891
ktime_get_real include/linux/timekeeping.h:79 [inline]
netif_rx_internal+0x344/0x4e0 net/core/dev.c:5153
__netif_rx+0x78/0xc0 net/core/dev.c:5196
veth_forward_skb drivers/net/veth.c:325 [inline]
veth_xmit+0x550/0x9f0 drivers/net/veth.c:378
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3644 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3660
__dev_queue_xmit+0x19a3/0x3660 net/core/dev.c:4454
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
hsr_xmit net/hsr/hsr_forward.c:382 [inline]
hsr_forward_do net/hsr/hsr_forward.c:473 [inline]
hsr_forward_skb+0x1335/0x2140 net/hsr/hsr_forward.c:626
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x30/0x80 kernel/kcov.c:320
Code: 04 24 65 48 8b 0d 80 85 7c 7e 65 8b 15 81 85 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00 00 74 4e <8b> 91 f8 15 00 00 83 fa 03 75 43 48 8b 91 00 16 00 00 44 8b 89 fc
RSP: 0018:ffffc9000376fc90 EFLAGS: 00000246
RAX: ffffffff813ca4e1 RBX: 00000000295da500 RCX: ffff888078f43c00
RDX: 0000000000000000 RSI: 00000000295da500 RDI: 00003fffffffffff
RBP: ffffc9000376fda8 R08: ffff8880295da55f R09: 1ffff110052bb4ab
R10: dffffc0000000000 R11: ffffed10052bb4ac R12: 0000000000000000
R13: ffff888078f43c00 R14: 000000000000002e R15: 0000000000000000
pfn_valid include/linux/mmzone.h:2008 [inline]
__virt_addr_valid+0xe1/0x540 arch/x86/mm/physaddr.c:65
kasan_addr_to_slab+0xd/0xc0 mm/kasan/common.c:36
__kasan_record_aux_stack+0xf/0xc0 mm/kasan/generic.c:477
task_work_add+0xd9/0x470 kernel/task_work.c:82
fput+0xdd/0x1a0 fs/file_table.c:440
filp_close+0x10f/0x150 fs/open.c:1547
__range_close fs/file.c:698 [inline]
__close_range+0x368/0x660 fs/file.c:755
__do_sys_close_range fs/open.c:1599 [inline]
__se_sys_close_range fs/open.c:1596 [inline]
__x64_sys_close_range+0x7a/0x90 fs/open.c:1596
RAX: ffffffffffffffda RBX: 00007ffc422168a0 RCX: 00007f102e59ce59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000001c768 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d020000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f102e815fac R14: 00007f102e815fa8 R15: 00007f102e815fa0
</TASK>
CPU: 0 PID: 5961 Comm: syz.2.19 Not tainted syzkaller #0
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 12 c6 35 09 65 66 8b 05 4a 4a b1 7e 66 85 c0 75 54 bf 01 00 00 00 e8 8b 22 0a 00 e8 b6 32 3b 00 fb 65 8b 05 16 4a b1 7e <85> c0 75 05 e8 95 31 ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc90000007880 EFLAGS: 00000282
RAX: 0000000000000302 RBX: 0000000000000201 RCX: 18c28050e2fc8300
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9a20
RBP: ffffc90000007900 R08: ffffffff911cc5ff R09: 1ffffffff22398bf
R10: dffffc0000000000 R11: fffffbfff22398c0 R12: ffffffff8a640b93
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000f10
FS: 0000555587d6c500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
Call Trace:
<IRQ>
spin_unlock_bh include/linux/spinlock.h:396 [inline]
hsr_register_frame_out+0x263/0x3a0 net/hsr/hsr_framereg.c:-1
hsr_forward_do net/hsr/hsr_forward.c:443 [inline]
hsr_forward_skb+0xdfb/0x2140 net/hsr/hsr_forward.c:626
RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> ab c8 ca f6 65 8b 05 3c f0 71 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000378fca0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 18c28050e2fc8300
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001
RBP: ffffc9000378fd30 R08: ffffffff911cc60f R09: 1ffffffff22398c1
R10: dffffc0000000000 R11: fffffbfff22398c2 R12: dffffc0000000000
R13: 1ffff920006f1fb8 R14: ffff8880258f6c00 R15: 1ffff920006f1f94
__do_sys_perf_event_open kernel/events/core.c:12958 [inline]
__se_sys_perf_event_open+0x183e/0x1c50 kernel/events/core.c:12609
RAX: ffffffffffffffda RBX: 00007f1f47015fa0 RCX: 00007f1f46d9ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f1f46e32d6f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f47015fac R14: 00007f1f47015fa0 R15: 00007f1f47015fa0
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 0a40c6fbd105 Linux 6.6.141
git tree: linux-6.6.y
kernel config: https://syzkaller.appspot.com/x/.config?x=90249d2d52c08134
dashboard link: https://syzkaller.appspot.com/bug?extid=275266cebc6586d5795e
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c546f2580000
dashboard link: https://syzkaller.appspot.com/bug?extid=275266cebc6586d5795e
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1104091f980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f8ea9d2eccbd/disk-0a40c6fb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c6db60fe7f69/vmlinux-0a40c6fb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0b2a5cb7bba7/bzImage-0a40c6fb.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+275266...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-...!: (1 GPs behind) idle=cefc/1/0x4000000000000000 softirq=12505/12507 fqs=12
rcu: (t=10502 jiffies g=9325 q=1023 ncpus=2)
rcu: rcu_preempt kthread starved for 10479 jiffies! g9325 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27720 pid:17 ppid:2 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5965 Comm: syz.3.20 Not tainted syzkaller #0
NMI backtrace for cpu 1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:get_current arch/x86/include/asm/current.h:41 [inline]
RIP: 0010:rcu_preempt_read_enter kernel/rcu/tree_plugin.h:379 [inline]
RIP: 0010:__rcu_read_lock+0x0/0x60 kernel/rcu/tree_plugin.h:402
Code: b3 6d 00 e9 db fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 62 fb ff ff 4c 89 f7 e8 7c b4 6d 00 e9 55 fb ff ff 0f 1f 80 00 00 00 00 <f3> 0f 1e fa 53 65 48 8b 1d a3 fe 91 7e 48 81 c3 3c 04 00 00 48 89
RSP: 0018:ffffc900001efc78 EFLAGS: 00000006
RAX: ffffffff81ae5ac0 RBX: ffff8880318f8000 RCX: ffff888078f43c00
RDX: 0000000000010100 RSI: ffffc900001efe80 RDI: ffff8880318f8000
RBP: ffffc900001efd88 R08: ffff8880318f848b R09: 1ffff1100631f091
R10: dffffc0000000000 R11: ffffed100631f092 R12: dffffc0000000000
R13: ffff8880318f8000 R14: ffffc900001f0338 R15: 1ffff9200003df94
FS: 0000555582a1b500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000001c768 CR3: 000000002f9ea000 CR4: 00000000003506e0
Call Trace:
<IRQ>
rcu_read_lock include/linux/rcupdate.h:784 [inline]
__perf_event_output kernel/events/core.c:7972 [inline]
perf_event_output_forward+0xb2/0x3e0 kernel/events/core.c:7995
__perf_event_overflow+0x447/0x630 kernel/events/core.c:9720
perf_event_overflow kernel/events/core.c:9741 [inline]
perf_swevent_hrtimer+0x439/0x610 kernel/events/core.c:11230
__run_hrtimer kernel/time/hrtimer.c:1754 [inline]
__hrtimer_run_queues+0x4e1/0xc40 kernel/time/hrtimer.c:1818
hrtimer_interrupt+0x3c9/0x9c0 kernel/time/hrtimer.c:1880
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
__sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 85 c8 0f 00 eb 15 e8 7e c8 0f 00 e8 09 b8 10 09 4d 85 e4 74 ea e8 6f c8 0f 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900001f03e0 EFLAGS: 00000246
RAX: ffffffff81776381 RBX: 0000000000000000 RCX: ffff888078f43c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001f0498 R08: ffffffff911cc5ff R09: 1ffffffff22398bf
R10: dffffc0000000000 R11: fffffbfff22398c0 R12: 0000000000000200
R13: 000001fb6ca015d2 R14: 1ffff9200003e07c R15: dffffc0000000000
timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
ktime_get_with_offset+0x103/0x330 kernel/time/timekeeping.c:891
ktime_get_real include/linux/timekeeping.h:79 [inline]
netif_rx_internal+0x344/0x4e0 net/core/dev.c:5153
__netif_rx+0x78/0xc0 net/core/dev.c:5196
veth_forward_skb drivers/net/veth.c:325 [inline]
veth_xmit+0x550/0x9f0 drivers/net/veth.c:378
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3644 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3660
__dev_queue_xmit+0x19a3/0x3660 net/core/dev.c:4454
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
hsr_xmit net/hsr/hsr_forward.c:382 [inline]
hsr_forward_do net/hsr/hsr_forward.c:473 [inline]
hsr_forward_skb+0x1335/0x2140 net/hsr/hsr_forward.c:626
send_hsr_supervision_frame+0x5fb/0xb90 net/hsr/hsr_device.c:346
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x30/0x80 kernel/kcov.c:320
Code: 04 24 65 48 8b 0d 80 85 7c 7e 65 8b 15 81 85 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00 00 74 4e <8b> 91 f8 15 00 00 83 fa 03 75 43 48 8b 91 00 16 00 00 44 8b 89 fc
RSP: 0018:ffffc9000376fc90 EFLAGS: 00000246
RAX: ffffffff813ca4e1 RBX: 00000000295da500 RCX: ffff888078f43c00
RDX: 0000000000000000 RSI: 00000000295da500 RDI: 00003fffffffffff
RBP: ffffc9000376fda8 R08: ffff8880295da55f R09: 1ffff110052bb4ab
R10: dffffc0000000000 R11: ffffed10052bb4ac R12: 0000000000000000
R13: ffff888078f43c00 R14: 000000000000002e R15: 0000000000000000
pfn_valid include/linux/mmzone.h:2008 [inline]
__virt_addr_valid+0xe1/0x540 arch/x86/mm/physaddr.c:65
kasan_addr_to_slab+0xd/0xc0 mm/kasan/common.c:36
__kasan_record_aux_stack+0xf/0xc0 mm/kasan/generic.c:477
task_work_add+0xd9/0x470 kernel/task_work.c:82
fput+0xdd/0x1a0 fs/file_table.c:440
filp_close+0x10f/0x150 fs/open.c:1547
__range_close fs/file.c:698 [inline]
__close_range+0x368/0x660 fs/file.c:755
__do_sys_close_range fs/open.c:1599 [inline]
__se_sys_close_range fs/open.c:1596 [inline]
__x64_sys_close_range+0x7a/0x90 fs/open.c:1596
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f102e59ce59
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc422167b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffc422168a0 RCX: 00007f102e59ce59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000001c768 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d020000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f102e815fac R14: 00007f102e815fa8 R15: 00007f102e815fa0
</TASK>
CPU: 0 PID: 5961 Comm: syz.2.19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:104 [inline]
RIP: 0010:__local_bh_enable_ip+0x142/0x1c0 kernel/softirq.c:413
Code: 8a e8 12 c6 35 09 65 66 8b 05 4a 4a b1 7e 66 85 c0 75 54 bf 01 00 00 00 e8 8b 22 0a 00 e8 b6 32 3b 00 fb 65 8b 05 16 4a b1 7e <85> c0 75 05 e8 95 31 ae ff 48 c7 04 24 0e 36 e0 45 4b c7 04 37 00
RSP: 0018:ffffc90000007880 EFLAGS: 00000282
RAX: 0000000000000302 RBX: 0000000000000201 RCX: 18c28050e2fc8300
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: ffffffff8b1c9a20
RBP: ffffc90000007900 R08: ffffffff911cc5ff R09: 1ffffffff22398bf
R10: dffffc0000000000 R11: fffffbfff22398c0 R12: ffffffff8a640b93
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000000f10
FS: 0000555587d6c500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2db63fff CR3: 000000007ac0c000 CR4: 00000000003506f0
Call Trace:
<IRQ>
spin_unlock_bh include/linux/spinlock.h:396 [inline]
hsr_register_frame_out+0x263/0x3a0 net/hsr/hsr_framereg.c:-1
hsr_forward_do net/hsr/hsr_forward.c:443 [inline]
hsr_forward_skb+0xdfb/0x2140 net/hsr/hsr_forward.c:626
send_hsr_supervision_frame+0x5fb/0xb90 net/hsr/hsr_device.c:346
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> ab c8 ca f6 65 8b 05 3c f0 71 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000378fca0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 18c28050e2fc8300
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001
RBP: ffffc9000378fd30 R08: ffffffff911cc60f R09: 1ffffffff22398c1
R10: dffffc0000000000 R11: fffffbfff22398c2 R12: dffffc0000000000
R13: 1ffff920006f1fb8 R14: ffff8880258f6c00 R15: 1ffff920006f1f94
__do_sys_perf_event_open kernel/events/core.c:12958 [inline]
__se_sys_perf_event_open+0x183e/0x1c50 kernel/events/core.c:12609
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1f46d9ce59
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff243e66c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f1f47015fa0 RCX: 00007f1f46d9ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f1f46e32d6f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1f47015fac R14: 00007f1f47015fa0 R15: 00007f1f47015fa0
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
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